固定化Anti-HBsAg单克隆抗体及其含HBsAg血清体外吸附评价

以壳聚糖微球为载体 ,经环氧氯丙烷活化后固定Anti HBsAg单克隆抗体。活化条件是 :环氧氯丙烷用量 0 3mL/g载体、活化温度 4 5℃、活化时间 4h、c(NaOH) =2mol/L ;固定化温度 3℃、固定化时间 2 4h ,活化壳聚糖与单克隆抗体的偶联率为 17.8%。患者血清体外吸附实验结果表明 ,该吸附剂可吸附除去 30 %～ 5 0 %致病抗体 ,血清由阳性转为阴性     

固定化Ani—HBsAg单克隆抗体及其含HBsAg血清体外吸附评价

以壳聚糖微球为载体，经环氧氯丙烷活化后固定Anti-HBsAg单克隆抗体。活化条件是：环氧氯丙烷用量0.3mL/g，活化温度45℃，活化时间4h,c(NaOH)=2mol/L ,固定化温度3℃，固定化时间24h，活化壳聚糖与单克隆抗体的联率为17．8％，患者血清体外吸附实验结果表明，该吸附剂可吸附除去30％－50％致病抗体，血清由阳性转为阴性。     

煤矸石复合吸附剂对含铅废水处理性能研究

以煤矸石、石灰石和氯化铝为原料,制备呈碱性的复合吸附剂和呈中性的复合吸附剂,处理含铅(Ⅱ)废水,结果表明,碱性吸附剂的最佳吸附条件为投加量0.5 g,吸附时间60 min,p H为1,反应温度为25℃时,此时吸附量为7.62 mg/g,去除率为96.68%;中性吸附剂的最佳吸附条件为投加量0.5 g,吸附时间80 min,p H为1,反应温度25℃,此时吸附量达到7.19 mg/g,去除率为85.40%。碱性复合吸附剂吸附含铅(Ⅱ)废水能较好的与准二级动力学拟合,中性复合吸附剂吸附含铅(Ⅱ)废水能较好的与准一级动力学拟合。采用Freundlich方程描述碱性复合吸附剂吸附低浓度和高浓度含铅(Ⅱ)废水,用Langmuir方程描述中性吸附剂吸附低浓度含铅(Ⅱ)废水,用Temkin方程描述中性吸附剂吸附高浓度含铅(Ⅱ)废水。     

煤矸石复合吸附剂对含铅废水处理性能研究

以煤矸石、石灰石和氯化铝为原料,制备呈碱性的复合吸附剂和呈中性的复合吸附剂,处理含铅(Ⅱ)废水,结果表明,碱性吸附剂的最佳吸附条件为投加量0.5 g,吸附时间60 min,p H为1,反应温度为25℃时,此时吸附量为7.62 mg/g,去除率为96.68%;中性吸附剂的最佳吸附条件为投加量0.5 g,吸附时间80 min,p H为1,反应温度25℃,此时吸附量达到7.19 mg/g,去除率为85.40%。碱性复合吸附剂吸附含铅(Ⅱ)废水能较好的与准二级动力学拟合,中性复合吸附剂吸附含铅(Ⅱ)废水能较好的与准一级动力学拟合。采用Freundlich方程描述碱性复合吸附剂吸附低浓度和高浓度含铅(Ⅱ)废水,用Langmuir方程描述中性吸附剂吸附低浓度含铅(Ⅱ)废水,用Temkin方程描述中性吸附剂吸附高浓度含铅(Ⅱ)废水。     

邻氯甲苯分子筛提纯吸附及动力学分析

通过实验研究邻氯甲苯中微量对氯甲苯的吸附，对不同类型的分子筛吸附剂进行筛选。结果表明：吸附剂C的吸附效果最优，最优吸附剂质量分数为12.5%,最优吸附时间为15 min;吸附过程为放热、熵减过程，且同时存在物理吸附和化学吸附；当对氯甲苯质量分数为0.45%时，吸附速率最快。     

重组G145R HBsAg亲和纯化方法的建立及其应用

目的建立重组乙型肝炎病毒G145R变异HBsAg抗体亲和纯化方法。方法用抗-HBs单克隆抗体(D12- McAb)制备亲和层析胶,对2A8细胞(分泌G145R变异HBsAg)培养上清盐析物进行亲和纯化。采用SDS-PAGE、Western blot及ELISA,对纯化产物的纯度、特异性、含量和回收率进行鉴定,并与同法纯化的HBsAg阳性血清及r-wHBsAg提取物进行比较。结果D12-McAb对重组真核表达G145R变异HBsAg、HBsAg阳性血清及r-wHBsAS三者具有相似的亲和性,产物纯度分别为90.3%、95.2%和93.1%,回收率分别为43.3%、72.0%和66.4%。结论已成功地建立了重组G145R变异HBsAg抗体亲和纯化方法,为G145R变异以及其他HBV免疫逃逸变异感染的深入研究奠定了重要的技术基础。     

一种用于CO吸附的分子筛吸附剂的制备及研究

以分子筛作为载体,添加氯化亚铜作为活性组分,并采用适当的黏结剂和成型方法制备出适用于吸附混合气中CO的吸附剂。在吸附剂制备过程中,考察了黏结剂种类、还原温度、吸附压力对吸附剂强度和CO吸附量的影响。研究表明:采用树脂型有机黏合剂能够大幅度提高吸附剂的强度,同时对吸附剂的吸附容量影响较小;当还原温度180℃,吸附反应温度40℃,吸附压力0.5 MPa时,对于组分(φ)为H247.1%,CO 31.5%,N219.1%,CH42.28%的模拟气体,吸附剂性能最优,CO吸附量达到最大值50 m L/g。制备的分子筛吸附剂吸附量大、强度较好、耐磨损,能够满足工业化应用的要求。     

竹炭/壳聚糖复合吸附剂的制备与吸附性能研究

以壳聚糖为改性剂,海藻酸钠为交联剂对竹炭进行改性,制备竹炭/壳聚糖复合吸附剂,并研究其对刚果红溶液的最佳吸附条件和吸附性能。实验结果表明:竹炭/壳聚糖复合吸附剂用量为0.2 g,刚果红溶液浓度为100 mg·L~(-1)、pH为4.0、吸附时间为2.0 h、吸附温度为25℃时,复合吸附剂对刚果红溶液的吸附率可达98.11%,影响吸附的主次顺序为吸附温度刚果红溶液浓度吸附时间pH。复合吸附剂在经过5次再生后,对刚果红溶液的吸附率仍然接近90%,说明复合吸附剂的重复使用性能良好。     

氧化铈改性沸石脱氮的研究

用浸渍焙烧法制备稀土吸附剂,用于静态脱氮实验。结果表明,氧化铈改性的稀土吸附剂吸附性能优于氧化镧和氧化镧-氧化铈复合改性的稀土吸附剂;当吸附剂用量为2 g/L,进水pH为4~6,吸附时间为2.5 h,氧化铈改性稀土吸附剂对模拟废水氨氮浓度为20 mg/L的吸附率达到80.23%;吸附剂再生6次后氨氮的去除率下降不到7%,说明吸附剂具有较好的稳定性。     

吸附制冷用复合吸附剂导热性能强化

采用混装和添加导热材料强化吸附剂的传热,在高真空重量装置上测定了复合吸附剂的吸附等温线;对吸附剂的吸附和脱附性能进行了差热分析;在吸附制冷循环模拟实验装置上评价了吸附剂传热性能。结果表明:添加导热材料制备的吸附剂导热性能得到了明显改善,吸附床层传热温差降低了23%～30%;复合吸附剂等温线形状没有发生改变,吸附质量分数有所下降;单位质量吸附剂的制冷量提高7.5%～12.5%;混装铁屑的吸附剂制冷量比其单独使用时高24%。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。